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Author:
Publisher:
ISBN:
Category : Ecological zones
Languages : en
Pages : 52
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Book Description
n weathering would result in soils of low or high availability of base cations. The presence or absence of ecological zones (large areas of similar environmental conditions consisting of temperature, moisture, and fertility, which are manifested by characteristic vegetative communities) were modeled as multivariate logistic functions of climatic, topographic, and geologic variables. Accuracy of ecozone models ranged from 69- to 95-percent correct classification of sample plots; accuracy of most models was > 80 percent. The most important model variables were elevation, precipitation amount, and lithologic group. A regional map of ecological zones was developed by using a geographic information system to apply the models to a 30-m digital elevation dataset. Overall map accuracy was refined by adjusting the best probability cut levels of the logistic models based on expert knowledge and familiarity of the authors with known ecological zone boundaries throughout the study area. Prelimin
Author:
Publisher:
ISBN:
Category : Ecological zones
Languages : en
Pages : 52
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Book Description
n weathering would result in soils of low or high availability of base cations. The presence or absence of ecological zones (large areas of similar environmental conditions consisting of temperature, moisture, and fertility, which are manifested by characteristic vegetative communities) were modeled as multivariate logistic functions of climatic, topographic, and geologic variables. Accuracy of ecozone models ranged from 69- to 95-percent correct classification of sample plots; accuracy of most models was > 80 percent. The most important model variables were elevation, precipitation amount, and lithologic group. A regional map of ecological zones was developed by using a geographic information system to apply the models to a 30-m digital elevation dataset. Overall map accuracy was refined by adjusting the best probability cut levels of the logistic models based on expert knowledge and familiarity of the authors with known ecological zone boundaries throughout the study area. Prelimin
Author: Susan L. Yarnell
Publisher: DIANE Publishing
ISBN: 1428953736
Category : Agriculture
Languages : en
Pages : 52
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Book Description
Author:
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ISBN:
Category : Biogeography
Languages : en
Pages : 92
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Book Description
This volume represents a first attempt at holistically classifying and mapping ecological regions across all three countries of the North American continent. A common analytical methodology is used to examine North American ecology at multiple scales, from large continental ecosystems to subdivisions of these that correlate more detailed physical and biological settings with human activities on two levels of successively smaller units. The volume begins with an overview of North America from an ecological perspective, concepts of ecological regionalization. This is followed by descriptions of the 15 broad ecological regions, including information on physical and biological setting and human activities. The final section presents case studies in applications of the ecological characterization methodology to environmental issues. The appendix includes a list of common and scientific names of selected species characteristic of the ecological regions.
Author: Timothy P. Spira
Publisher: Univ of North Carolina Press
ISBN: 0807877654
Category : Nature
Languages : en
Pages : 541
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Book Description
This richly illustrated field guide serves as an introduction to the wildflowers and plant communities of the southern Appalachians and the rolling hills of the adjoining piedmont. Rather than organizing plants, including trees, shrubs, and herbaceous plants, by flower color or family characteristics, as is done in most guidebooks, botanist Tim Spira takes a holistic, ecological approach that enables the reader to identify and learn about plants in their natural communities. This approach, says Spira, better reflects the natural world, as plants, like other organisms, don't live in isolation; they coexist and interact in myriad ways. Full-color photo keys allow the reader to rapidly preview plants found within each of the 21 major plant communities described, and the illustrated species description for each of the 340 featured plants includes fascinating information about the ecology and natural history of each plant in its larger environment. With this new format, readers can see how the mountain and piedmont landscapes form a mosaic of plant communities that harbor particular groups of plants. The volume also includes a glossary, illustrations of plant structures, and descriptions of sites to visit. Whether you're a beginning naturalist or an expert botanist, this guidebook is a useful companion on field excursions and wildflower walks, as well as a valuable reference. Southern Gateways Guide is a registered trademark of the University of North Carolina Press
Author:
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ISBN:
Category : Forests and forestry
Languages : en
Pages : 192
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Book Description
Author: Shannon Elizabeth Bell
Publisher: University of Illinois Press
ISBN: 0252095219
Category : Nature
Languages : en
Pages : 225
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Book Description
Motivated by a deeply rooted sense of place and community, Appalachian women have long fought against the damaging effects of industrialization. In this collection of interviews, sociologist Shannon Elizabeth Bell presents the voices of twelve Central Appalachian women, environmental justice activists fighting against mountaintop removal mining and its devastating effects on public health, regional ecology, and community well-being. Each woman narrates her own personal story of injustice and tells how that experience led her to activism. The interviews--many of them illustrated by the women's "photostories"--describe obstacles, losses, and tragedies. But they also tell of new communities and personal transformations catalyzed through activism. Bell supplements each narrative with careful notes that aid the reader while amplifying the power and flow of the activists' stories. Bell's analysis outlines the relationship between Appalachian women's activism and the gendered responsibilities they feel within their families and communities. Ultimately, Bell argues that these women draw upon a broader "protector identity" that both encompasses and extends the identity of motherhood that has often been associated with grassroots women's activism. As protectors, the women challenge dominant Appalachian gender expectations and guard not only their families but also their homeplaces, their communities, their heritage, and the endangered mountains that surround them. 30% of the proceeds from the sale of this book will be donated to organizations fighting for environmental justice in Central Appalachia.
Author: Jürgen Schultz
Publisher: Springer Science & Business Media
ISBN: 3662031612
Category : Science
Languages : en
Pages : 423
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Book Description
This abundantly illustrated book provides a fundamental introduction to the ecological zones of the geosphere. The revised edition includes more than 70 new figures and tables, plus detailed maps of agricultural regions and soil classification. A large number of new Anglo-American ecological studies are included, along with a discussion of the correlation between northern ecosystems and the carbon dioxide balance in the global atmosphere.
Author: David H. Van Lear
Publisher:
ISBN:
Category : Fire ecology
Languages : en
Pages : 24
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Book Description
Author: Brian J. Palik
Publisher: John Wiley & Sons
ISBN: 1119890934
Category : Nature
Languages : en
Pages : 342
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Book Description
ECOLOGICAL SILVICULTURAL SYSTEMS Unleash the natural power and adaptability of forests with this cutting-edge guide For generations, silvicultural systems have focused largely on models whose primary objective is the production of timber, leading to drastically simplified forests with reduced ecological richness, diversity, and complexity. Ecological silviculture, by contrast, focuses on producing and maintaining forests with “all their parts”—, that is, with the diversity and flexibility to respond and adapt to global changes. Ecological silviculture seeks to emulate natural development models and sustain healthy forests serving multiple values and goals. Ecological Silvicultural Systems provides a comprehensive introduction to these approaches and their benefits tailored to diverse types of forests, designed for forest management professionals. It provides a series of exemplary models for ecological silviculture and surveys the resulting forest ecosystems. The result is a text that meets the needs of professionals in forestry and natural resource management with an eye towards sustaining healthy forest ecosystems, adapting them to climate change, protecting them from invasive species, and responding to changing market forces. Ecological Silvicultural Systems readers will also find: Detailed treatment of forest ecosystems in North America, Europe, South America, and Australia A broad field of contributors with decades of combined expertise on multiple continents Discussion of pine woodlands; temperate hardwood forests, boreal forests, temperate rainforests, and more Ecological Silvicultural Systems is a useful reference for professional foresters, wildlife habitat managers, restoration ecologists, and undergraduate and graduate students in any of these fields.
Author:
Publisher:
ISBN:
Category : Appalachian Region, Southern
Languages : en
Pages : 236
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Book Description
